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Finding the Third Proportional to 218,907 and 325,440

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Solution

The third proportional to 218,907 and 325,440 is: 483,818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,907 : 325,440 = 325,440 : x
  2. Step 2: Convert to fraction form
    218,907/325,440 = 325,440/x
  3. Step 3: Cross multiply
    218,907x = 325,440 × 325,440
  4. Step 4: Simplify right side
    218,907x = 105,911,193,600
  5. Step 5: Solve for x
    x = 105,911,193,600/218,907
  6. Step 6: Final answer
    x = 483,818.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.